These are over-the-counter (OTC) and prescription medications that block histamine, a chemical that causes your body to develop allergic symptoms such as sneezing, itching, a runny nose ...

Handling histamine intolerance can be difficult, especially if you enjoy eating foods high in histamine. Side effects like headaches, hives, and gastrointestinal problems can quickly spoil your day.

Histamine - a chemical found in some of the body's cells - causes many of the symptoms of allergies, such as a runny nose or sneezing. When a person is allergic to a particular substance, such as a ...